Hey Martin, you’re definitely right. I’m a MailChimp user as well and they do use Merge Fields but it allows you to merge from the contact info of a specific list you’re sending to. Each list (company if you’re an agency) has its own contact info that can be filled so that the CAN-SPAM automatically matches the business/company associated with the list.
Is there any chance that this type of feature could be added in the future to support agencies? Right now I’ve got four different companies (one of which has 10 different locations with different contact info) and I’m not really sure how to move forward.